Non-periodicity of chemostats: a multi-dimensional negative Bendixson Dulac criterion

  title={Non-periodicity of chemostats: a multi-dimensional negative Bendixson Dulac criterion},
  author={Bernold Fiedler},
A vehicle (10) mounted on a T-shaped rail (100) and having wings (11) providing lift is described. The vehicle uses magnets (18) on the vehicle and materials (101) attracted by the magnet on the rail to provide magnetic levitation. Propulsion is provided by a motor (15). The vehicle is adapted for high speed travel slightly above the ground. 

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